Revision - 4416f89 - target: Attach EXTENDED_COPY local I/O descriptors to xcopy_pt_sess - origin: https://github.com/torvalds/linux

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05 April 2024, 19:05:47 UTC

Revision 4416f89b8cfcb794d040fc3b68e5fb159b7d8d02 authored by Nicholas Bellinger on 03 September 2015, 06:30:45 UTC, committed by Nicholas Bellinger on 11 September 2015, 07:32:26 UTC

target: Attach EXTENDED_COPY local I/O descriptors to xcopy_pt_sess

This patch is a >= v4.1 regression bug-fix where control CDB
emulation logic in commit 38b57f82 now expects a se_cmd->se_sess
pointer to exist when determining T10-PI support is to be exposed
for initiator host ports.

To address this bug, go ahead and add locally generated se_cmd
descriptors for copy-offload block-copy to it's own stand-alone
se_session nexus, while the parent EXTENDED_COPY se_cmd descriptor
remains associated with it's originating se_cmd->se_sess nexus.

Note a valid se_cmd->se_sess is also required for future support
of WRITE_INSERT and READ_STRIP software emulation when submitting
backend I/O to se_device that exposes T10-PI suport.

Reported-by: Alex Gorbachev <ag@iss-integration.com>
Tested-by: Alex Gorbachev <ag@iss-integration.com>
Cc: "Martin K. Petersen" <martin.petersen@oracle.com>
Cc: Hannes Reinecke <hare@suse.de>
Cc: Christoph Hellwig <hch@lst.de>
Cc: Doug Gilbert <dgilbert@interlog.com>
Cc: <stable@vger.kernel.org> # v4.1+
Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>

1 parent 8f9b565

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Tip revision: 4416f89b8cfcb794d040fc3b68e5fb159b7d8d02 authored by Nicholas Bellinger on 03 September 2015, 06:30:45 UTC
target: Attach EXTENDED_COPY local I/O descriptors to xcopy_pt_sess

Tip revision: 4416f89

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.gitignore	-rw-r--r--	1.2 KB
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Kbuild	-rw-r--r--	2.6 KB
Kconfig	-rw-r--r--	252 bytes
MAINTAINERS	-rw-r--r--	312.5 KB
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target: Attach EXTENDED_COPY local I/O descriptors to xcopy_pt_sess

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